Life can not be considered without real money. There is no alternative to money in every step. But in the digital era, as a digital currency, Bitcoin can increase the use as a real money?
It is challenging for Bitcoins to become global currency because people now consider Bitcoin as a kind of asset. They only sell when the exchange rate is high and profitable. So in the future, ETH and altcoins have the potential to become the global currency, replacing the cash used today.